Bobbin-clutching means for rotatable spindles.



PATBNTBD Nov; e, 41906.y i G. 0. DRAPBR. BoBBIN GLUTGHING MEANS PoR ROTATABLB sPINnLBs.

ycrnTEi) STATES PAIENI` OFFICE.

GEORGE o, DRAPER, OP HOPEDALE, MASSACHUSETTS, ASSIGNOR TO SAwYER SPINDLE COMPANY, OP PORTLAND, MAiNE.

BOBBlN-CLUTCHING MEANS FOR ROTATABLEI SPINDLES.

Specification` of Letters Patent.

Patented Nov. 6, 1906.

Application file-d NOVlllber 11, 1905. Serial No. 286,774.

'orml whom it may concern):

Be it known that I, GEORGE O. DRAPER, a citizen ofthe United States, and a resident of `Hopedale, county of Worcester, State of Massachusetts, have invented an Improvement, in Bobbin-Clutchng Means for Rotatable Spindles, ofk which the following description, in connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts.

This'invention has for its object the production of novel means for retaining a yarnreceiver or bobbin in operative position on a rotatable spinning twisteror other spindle and driving such yarn-receiver in unison with the spindle.

In my present invention the bobbin is retained in position on the spindle by clutching members which act by or through centrifugal force to engage and effect rotation ofthe bobbin,iand by a peculiar construction of such members a positive wedging action is also brought into Vaction'to assist in preventing any lateral movement of the lbobbin relative to the spindle. I have also provided novel means for sustaining the lower ends ofthe clutching members, so that they may tip or pivot on their lower ends, but without any appreciable outward movement thereat, and novel means is provided for controlling the upper ends of the clutching members.

The various novel features of my invention will be fully described in the subjoined specification and particularly pointed out in the following claims.

Figure 1. is a side elevation of a rotatable spinning or similar spindle and its attached whirl with oneembodiment of my novel bobbin-retaining means applied thereto. Fig. 2 is a similar view, but omitting the clutching members to more clearly show certain parts hidden in Fig. 1. Fig. 3 is a diametral vertical section on the line 3 3, Fig. 1, showing in section aportion of a yarn-receiver or bobbin in operative position, the spindle being' shown in` elevation and the whirl partly in section; and Fig. 4 is a detached view of one of the clutching members.

The rotatable spindle 1`of usual construction has an attached whirl 2, connected by an extension 3, terminating in an enlarged circular head 4, serving as a vertical rest or support for the bobbin B, as in Fig. 3, the arts thus far described being all substantia y as in various forms of centrifugally-acting bobbin-clutching means now in use.

l The upper face of the head 4 is provided with an annular raceway 5, concentric with the spindle and substantially V-shaped inA cross-section, the inner and upright wall of the raceway being formed by an elongated enlargement 6 of the spindle, which enlargement may be integral with the spindle or a `Sleeve-like part of the Whirl., as in Fig. 3. VAt.

its u per end the part 6 presents an annular shou der 7, Figs. 2 and 3, for a purpose to be described.

The outer wall of the raceway 5 flares'outi Ward, as shown, and into the said raceway the lower ends of a plurality of clutching members 8 are seated, such lower ends being beveled at 9, FigsQ3 and 4, to fit intothe raceway in such manner that while the mem- ;bers 8 may tip or rock on their lower ends they are held from any appreciable-outward or radial movement.,

The clutching members are of usual shape externally, as Shown v in Fig. 1, and are grouped around the enlargement 6, their upper ends being shown as inset to form upturned heads 10 of less width than the body` portions of the members 8. The clutching members are, by being made thicker at their lower ends, shaped longitudinally to givea slightly larger circumference at their lower ends even when the said. members are thrown y Outward at their upper ends by centrifugal action, Figs. 1 and 3, so that when the bobbin B is applied the clutching members exert a wedging action upon the walls of the bobbin-recess b, Fig. 3, particularly at the lower ends of the clutching members. By this arrangement I obtain what may be termed a positive and fixed positioning of the bobbinbase with relation to the spindle.

Heretofore in this class of bobbin-connectors the clutching members are loose at both their lower and upper ends, suchlooseness tending to Acommunicate a very perceptible freedom of motion and yration to the base of the bobbin when unba anced, causing some gyration and vibration of the spindle, which is objectionable because more power is-re-` quired and oil is wasted, asa vibrating spindle looses its oil ra idly.

When the bobbin-base is fiXedly held with relation to the spindle, as herein set forth,

IOO

the gyrations and vibrations referred to are. y g

prevented and the objectionable results due thereto eliminated.

Of course the clutching action of the mem-v Y move it.

effect their A collar 11, preferably of sheet metal and cup-like in shape, is secured in inverted position on the spindle above the upper ends of the clutching members, the heads l0 of the latter extending upward loosely within the downturned rim of the collar. The latter thus loosely embraces the heads of the clutching members, permitting` outward movement thereof by or through centrifugal action when the spindle is rotating at speed, but limiting such outward movement and retaining the clutching members in place when the spindle is running free.

A series of depending extensions or fingers a 12 extend below the rim of the collar integral therewith, and said extensions are bent inward at their extremities against the s indle and abut against the shoulder 7, which) thus forms a positive limiting-stop for the collar when driven down onto the spindle, so that there is no possibility of the collar being driven down far enough to pinch the clutching members and prevent their proper operation. Said extensions project between the upper ends of contiguous clutching members and laterally separate the same, as well as positive rotation with the spindle. The collar is readily stamped or struck up from sheet metal of suiiicient thickness to give it the desired strength.

The centrifugal action upon the clutching members causes them to frictionally engage the bobbin with a firm hold to drive the bobbin with the spindle while permitting ready a plication or removal of such bobbin, while the wedging action of said members at the base of the bobbin prevents any lateral freedom of movement thereof without re uiring any crowding or jamming to apply t e bobbin.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, ish

1. The combination, with a rotatable spin- V dle and an attached whirl, of bobbin-clutching members ivotally coniined at their lower ends by t e whirl, a sleeve surrounding the spindle within said members, a collar ixedly secured to the spindle to loosely cooperate with the upper ends of the clutching members and limit their outward movement,

and depending extensions on the collar interposed between contiguous clutching members and meeting the upper end of the sleeve.

2. The combination, with a rotatable spindle and an attached whirl, of bobbin-clutching members 4fulcrumed at their lower ends on the whirl and prevented thereby from outward movement, a collar iixedly secured to the spindle and loosely embracing the upper ends of the clutching members, to permit outward movement thereat while limiting such movement, depending extensions on the collar interposed between contiguous clutching members, and a shoulder on the spindle forming a -lixed. stop for said extensions.

3. rlhe combination, with a rotatable spindle and an attached whirl, provided with a concentric raceway having a flaredy outer wall, of bobbin-clutching members having their lower ends. beveled to enter the raccway, whereby said members can rock in said raceway without outward movement therein, and means iixedly mounted on the spindle to separate the clutching members and permit limited outward movement of their upper ends.

4. The combination, with a rotatable spindle and an attached whirl, provided with a `concentric raceway having a flared outer wall, of bobbin-clutching members having their lower ends beveled to enter the raceway, whereby said members can rock in said raceway without outward movement therein, a sheet-metal collar fast on the spindle and loosely embracing the upper ends of the clutching members, to limit outward movement thereof, integral extensions on the collar depending therefrom between contiguous clutching members, and a fixed stop on the spindle against which the extremities of said extensions abut.

5. The combination, with a rotatable spindle and an attached whirl having an annular raceway V-shaped in cross-section, of bobbin-clutching members having correspondingly-shaped lower ends to fit in said raceway, permitting said members to rock while preventing outward movement at their lower ends, a collar fast on the spindle and loosely embracing the upper ends of the clutching members, depending, integral extensions on the collar interposed between contiguous members and bent inward at their extremities, and an annular shoulder on the spindle against which such extremities abut.

6. The combination, with a rotatable spindle and an attached whirl of bobbin-clutch- 'ing members pivotally supported at their lower ends on the whirl and held from eutward. movement thereat, a concentric enlargement on the spindle within the clutching members, an inverted, cup-like collar fast on the spindle and embracing loosely the upper ends of the clutching members, and depending, inwardly-bent extensions on the lower rim of the collar abutting against the `upper end of the spindle enlargement and in- IOC/ IlO

1tOerposed between contiguous clutching memers` 7. The combination, with a rotatable s indle and an attached whirl7V of centrifuga lyacting bobbin-clutching members having a pivotal connection at their lower ends with the whirl and having a limited outward movement at their upper ends only, the clutching membersv havmgtheir lower circumference slightly larger than the upper circumference when their upper ends are fully out, to eXert'a wed ing action upon the bobbin and assist in ho ding the same true with relation to the spindle, and means to laterally separate contiguous clutching members and positivelT cause their rotation kbodily with the spindle.

8. The combination, with a rotatable spinmembers mounted thereon, the circumference oi the members when the spindle is at v rest being slightly greater at one point than the internal circumference of the engaging bore of the bobbin, to exert a wedgi'ng frictional enga ement between fsaid members and the bobin in addition to the centrifugal engagement when the spindle is in motion.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

GEORGE O. DRAPER. Witnesses:

E. D. BANoRoFT, E. R. MORRISON. 

